[MikeK]

Originally Posted by dean from bozeman

. . . Let's say that there is Model A #1 and Model A #2. Both of these vehicles are identical in every way. Model A #1 goes on trips that total 24 hours and let's say 1200 miles. Model A #2 goes on a 24 hour, 1200 mile trip. After their respect 1200 mile jaunts, will they again be identical? Could the babbit in #2 be affected in any way by this continual use trip?

Thermal cycles, cold start to operating temp, are detrimental to both the fatigue life of stressed parts and the wear life of bearing surfaces.